JP2014028064A - Disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of leakage by prompting a user to tear an easy-tearing line provided in a fastening sheet when used and fitting a paper diaper to the user with the torn fastening sheet.SOLUTION: The disposable diaper is provided, in which at least two upper and lower projecting portions projecting outward are each formed on a base sheet in both the sides of the back of the paper diaper, and which is worn in a body by having the fastening sheet in which an adhesive layer or a surface fastener element is provided in the inside surface of the projecting portion and fastening the projecting portion on the abdominal side surface of the paper diaper. In the disposable diaper, the easy-tearing line is formed from the tip side to the base end side between the upper and lower projecting portions, and in a product state, the tip side of the fastening sheet is folded back with the inside surface side of the projecting portion kept inside and the right and left positions of the folding-back are closer to the base end side of the fastening sheet than the tip of the easy-tearing line.

Description

  The present invention relates to a disposable diaper that is worn on a wearer by fastening fastening tapes provided on both sides of the back side of the paper diaper to the ventral surface of the paper diaper.

  About the fastening tape used for a disposable diaper, what gave various devices is indicated. For example, in the invention described in Patent Document 1, when a caregiver wears a deployable paper diaper on a user, the user can easily place and wear the user at an appropriate position with respect to the longitudinal direction of the paper diaper. The identification part is provided in the position which overlaps with the easy tear line provided in the side flap. In addition, the invention described in Patent Document 2 is a thin wall that extends toward the fixed portion between the adjacent knob portions in order to make it easy to use the adjacent knob portions of the fastening tape crossed or expanded. Is provided. Furthermore, in the invention described in Patent Document 3, in order to enable the fastening sheet to be arbitrarily adapted to the cross fastening as well as the normal fastening method, the fastening sheet portion between the joining pieces is changed from the outer edge side to the inner side. Easy tear lines are provided.

  As in the invention described in Patent Document 3, a product of a type that can separate the fastening sheet up and down by tearing an easy tear line provided in the fastening sheet increases the degree of freedom of the position to stop the fastening sheet. Since cross-stopping is possible, there is an advantage that even if the user has a thin body shape, the disposable diaper can be fitted. Moreover, since it is a form which isolate | separates a fastening sheet at the time of use, a fastening tape can be handled as one member at the time of production, and adjustment of the adhesion position of a paper diaper main body and a fastening sheet becomes easy.

  However, the easy tear lines provided on the fastening sheets of disposable diapers that are generally sold at present are difficult to see, and are only noticeable by pulling the fastening sheets up, down, left and right. In addition, care workers who frequently use disposable diapers often change their care staff. There is a strong tendency to use it as it is. As a result, there is a problem that the paper diaper does not fit the user and leakage occurs.

Japanese Patent No. 4019151 JP 2011-200336 A JP 2005-160506 A

  Therefore, the main problem of the present invention is to prevent the occurrence of leakage by urging to tear the easy tear line provided in the fastening sheet at the time of use, and fitting the paper diaper to the user using the torn fastening sheet. It is in.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
At least two upper and lower protrusions protruding outward are formed on the base sheet on both sides of the back side of the paper diaper, and an adhesive layer or a hook-and-loop fastener element is provided on the inner surface of the protrusion. In a disposable diaper comprising a fastening sheet, and adapted to be attached to the body by fastening the protrusion to the ventral surface of a paper diaper,
An easy tear line is formed from the front end side to the base end side between the upper and lower protrusions,
In the product state, the front end side of the fastening sheet is folded back with the inner surface side of the protruding portion inside,
The disposable diaper characterized in that the folded left and right position is located closer to the proximal end side of the fastening sheet than the distal end of the easy tear line.

(Function and effect)
Even if the person who installs the disposable diaper does not recognize the presence of the easy tear line provided on the fastening sheet, at the stage of attaching the disposable diaper, one of the protruding parts of the folded fastening sheet is folded back. When it is expanded outward, it is torn from the tip of the easy tear line to at least the folding position, so that the tear can be performed regardless of whether or not the existence of the easy tear line is confirmed. In addition, what is necessary is just to perform further tearing operation, when the easy tear line is extended further to the base end side from the folding position.

<Invention of Claim 2>
The disposable diaper according to claim 1, wherein a shape of the base end side between the upper and lower protruding portions is substantially V-shaped, and is a curve or a straight line gradually narrowing from the distal end side toward the terminal end of the proximal end side.

(Function and effect)
By adopting the configuration as described above, the easy tear line can be more easily torn.

<Invention of Claim 3>
The disposable diaper according to claim 1 or 2, wherein an interval between easy tear lines extending from the folded position to the distal end side is smaller than an interval between easy tear lines extending from the folded position to the proximal end side.

(Function and effect)
The easy tear line extending from the folding position to the distal end side can be more easily torn than the easy tear line extending from the folding position to the proximal end side.

<Invention of Claim 4>
The disposable diaper according to any one of claims 1 to 3, wherein substantially all of the joint portions are cut in advance between the front end side of the easy tear line and the folding position.

(Function and effect)
The same effects as those of the third aspect are achieved.

<Invention of Claim 5>
Of the two upper and lower protruding portions, one protruding portion is longer than the other protruding portion, and protrudes outward,
The disposable diaper according to claim 1, wherein the strength of the pressure-sensitive adhesive layer or the hook-and-loop fastener element provided on the other protrusion is stronger than the strength of the pressure-sensitive adhesive layer or the hook-and-loop fastener element provided on the one protrusion. .

(Function and effect)
A person who performs the operation of installing the disposable diaper can guide the user to pinch one of the two upper and lower protrusions that protrudes outward. And since the strength of the pressure-sensitive adhesive layer or the hook-and-loop fastener element provided in one protrusion is weaker than the strength of the pressure-sensitive adhesive layer or the hook-and-loop fastener element provided in the other protrusion, the pinched one protrusion is Easy to peel off.
Moreover, since the intensity | strength of the adhesive layer provided in the other protrusion part or the hook_and_loop | surface fastener element is strong, the tearing of an easy tear line becomes easy.

<Invention of Claim 6>
The disposable diaper according to any one of claims 1 to 5, wherein the folded left and right position is a position spaced 10 mm or more from the distal end side end of the easy tear line to the proximal end side.

(Function and effect)
When one of the protruding portions of the folded fastening sheet is expanded outward to the folding position, it is torn from the tip of the easy tear line to at least the folding position, so that the distance to be torn can be increased. As a result, the labor of further tearing operation can be reduced.

  As described above, according to the present invention, it is urged to tear the easy tear line provided in the fastening sheet at the time of use, and the paper diaper is fitted to the user using the torn fastening sheet, thereby preventing the occurrence of leakage. Can do.

It is a partial fracture development view of the disposable diaper concerning the present invention. It is a principal part enlarged view of the fastening sheet | seat part of a disposable diaper. It is the conventional folding method of the fastening sheet part of a disposable diaper. It is the folding | turning method of this invention of the fastening sheet | seat part of a disposable diaper. It is the folding method of this invention of the fastening sheet | seat part of a disposable diaper, Comprising: It is the figure which showed the example which the shape of the base end side between an up-and-down protrusion part consists of a curve which narrows gradually toward a base end side from a front end side. It is the folding | turning method of this invention of the fastening sheet | seat part of a disposable diaper, Comprising: It is the figure which showed the example from which the part from the front end side of the easy tear line to the folding position is cut | disconnected substantially. It is the folding | turning method of this invention of the fastening sheet part of a disposable diaper, Comprising: It is the figure which showed the example whose length of one protrusion part is longer than the other protrusion part. It is the folding method of this invention of the fastening sheet | seat part of a disposable diaper, and is the figure which showed the modification which changed the folding position and the length of the easy tear line. It is the folding method of this invention of the fastening sheet | seat part of a disposable diaper, Comprising: It is the figure which showed the modification which changed the length of the easy tear line.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
In each constituent article constituting the disposable diaper of the present invention, in a state where the paper diaper is unfolded, the surface closer to the wearer is referred to as a “use surface”, and the far surface is referred to as a “back surface”. The side closer to the wearer's skin is referred to as the “use side”, and the far side is referred to as the “back side”. Further, regarding the fastening sheet, in the state in which the fastening sheet is unfolded, the width direction outer side of the disposable diaper is referred to as “tip side”, and the width direction center side is referred to as “base end side”.

  FIG. 1 shows a disposable diaper 200 according to the present invention. This disposable diaper 200 has a crotch part, and a ventral part F and a back part B extending on both front and rear sides thereof. The dimensions of each part can be determined as appropriate.

  The tape-type disposable diaper 200 of the present embodiment has a structure in which the back sheet 1 is provided on the back surface side, and the liquid-impermeable sheet 15, the absorbent body 3, and the top sheet 2 are laminated in order toward the use surface side. ing. Although not shown, a second sheet 16 may be provided between the absorber 3 and the top sheet 2.

  In the present invention, the sheet on the side closest to the wearer's skin is referred to as the top sheet 2. The top sheet 2 is composed of a plurality of unit sheets.

  A liquid-impermeable sheet 15 is provided outside the absorber 3 so as to protrude slightly from the periphery of the absorber 3. As the liquid-impermeable sheet 15, a sheet having a water barrier property is preferable. In addition to a polyethylene film or the like, a sheet having moisture permeability can be used without impairing the water barrier from the viewpoint of preventing stuffiness. This water-impervious / breathable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. Can be used.

  Further, the back surface of the liquid-impermeable sheet 15 is covered with a back sheet 1 made of a non-woven fabric, and the back sheet 1 bites outside the periphery of the liquid-impermeable sheet 15 with a predetermined protrusion width. I'm out. As the back sheet 1, various nonwoven fabrics can be used. As the material fiber constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used.

  As described above, the second sheet 16 may be provided on the use surface of the absorber 3. The width of the second sheet 16 may be provided so that the absorber 3 partially protrudes from the side edge of the second sheet 16, or the width of the second sheet 16 is increased so that the side edge of the absorber 3 does not protrude. You can also. As the second sheet 16, a perforated or non-porous nonwoven fabric or a perforated plastic sheet is used. As the material fiber constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used. In the present invention, a form in which the second sheet 16 is omitted can be considered.

  A front target tape 6 is provided along the width direction on the ventral surface of the paper diaper. A paper diaper is attached to the body by fastening a surface fastener element 9 to be described later to the front target tape 6.

  Fastening sheets 5 are provided between the back sheet 1 and the top sheet 2 at both ends in the back side direction of the disposable diaper 200. The fastening sheet 5 and the back sheet 1 or the top sheet 2 are bonded with a hot melt adhesive or the like. The fastening sheet 5 is not necessarily provided between the back sheet 1 and the top sheet 2. Specifically, it may be provided on the outer surface of the back sheet 1 or the inner surface of the top sheet 2.

The fastening sheet 5 can be formed by laminating a plurality of nonwoven fabrics NF, or can be formed of a single nonwoven fabric NF. As this nonwoven fabric NF, known ones can be used without any particular limitation. As a raw material fiber constituting the nonwoven fabric NF, synthetic fibers such as polyethylene or polypropylene such as olefin, polyester and amide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used. Moreover, as a processing method of nonwoven fabric NF, well-known methods, such as the spunlace method, the spunbond method, the SMS method, the thermal bond method, the melt blown method, the needle punch method, the air through method, the point bond method, can be used. In particular, a spunbond nonwoven fabric and an SMS nonwoven fabric using olefin fibers are preferable. The basis weight of the nonwoven fabric NF to be used can be determined as appropriate, but preferably has a basis weight of 50 to 100 g / m ² .

  The fastening sheet 5 has a base sheet 8 that is fixed to the diaper main body on the base end side and extends from the base end side to the tip end side. Further, the fastening sheet 5 also has at least two upper and lower protruding portions 12 formed on the front end side of the base sheet 8 and protruding outward. The projecting portion 12 may be formed by projecting the base sheet 8 itself outward, or a member constituting the projecting portion 12 separate from the base sheet 8 is prepared and used as a base material. You may form by adhering to the sheet | seat 8. FIG. When making the protrusion part 12 a different body from the base material sheet 8, a nonwoven fabric and an elastic elastic member can be used for the raw material. Examples of the elastic elastic member include materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, and polyester. As a nonwoven fabric, the raw material similar to the said base material sheet 8 can be used, for example.

  The protruding portion 12 is composed of at least two upper and lower stages. Although three or more upper and lower protrusions 12 may be provided, the number of steps is preferably smaller in consideration of the ease of manufacture and the convenience at the time of mounting, and those having two upper and lower steps are particularly preferable. Between the protrusion 12 and the protrusion 12, a portion where the protrusions 12 are separated (a separation part 13) is formed.

  An adhesive layer 8 or a hook-and-loop fastener element 9 is provided on the inner side surface of the protruding portion 12. As the pressure-sensitive adhesive layer 8, for example, an acrylic adhesive mainly composed of a polyacrylate ester, a tackifier mainly composed of an elastic component of natural rubber or synthetic rubber, a plasticizer, A rubber adhesive or the like in which an anti-aging agent or the like is blended can be used. In addition, a hot melt adhesive or the like can also be used. Moreover, as the hook_and_loop | surface fastener element 9, the hook material and loop material of hook_and_loop | surface fastener can be used.

  When the hook-and-loop fastener element 9 is provided on the protruding portion 12, the front target tape 6 and the hook-and-loop fastener element 9 provided on the ventral surface of the paper diaper can be detachably fastened. For example, when the hook-and-loop fastener element 9 provided on the protruding portion 12 is a hook material, the front target tape 6 is a loop material. Further, when the hook-and-loop fastener element 9 provided on the protruding portion 12 is a loop material, the front target tape 6 is a hook material.

  An easy tear line 10 is formed on the base sheet 8 between the upper and lower protrusions 12 from the distal end side toward the proximal end side. The easy tear line 10 may be a perforation, or may be a plurality of through holes having a circular shape or an elliptical shape with a predetermined interval. Moreover, the length of the easy tear line 10 can be determined arbitrarily. Specifically, the base sheet 8 may be provided from the distal end to the proximal end, or may be provided at a slight distance from the distal end toward the proximal end. However, when a slight distance is provided from the distal end toward the proximal end, the length at which the easy tear line 10 to be described later is cut is shortened, and labor for further tearing operation is required when cross-stopping is performed. Is required. Therefore, it is preferable that the length of the easy notch line is provided at least up to a position spaced 10 mm or more from the distal end of the base sheet 8.

  In the present invention, in the product state, the front end side of the fastening sheet 5 is folded back with the inner surface side of the protruding portion 12 inward. At this time, the folded left and right position is provided at a position closer to the proximal end side of the fastening sheet 5 than the distal end of the easy tear line 10.

  When the front end side of the fastening sheet 5 is folded back with the inner surface side of the projecting portion 12 inward, the adhesive layer or the hook-and-loop fastener element provided on the inner surface side of the projecting portion 12 and the facing fastening sheet 5 temporarily stop. Worn. More specifically, when the pressure-sensitive adhesive layer is provided on the inner surface side of the protruding portion 12, the pressure-sensitive adhesive layer adheres to the fastening sheet facing the pressure-sensitive adhesive layer. Moreover, when the hook-and-loop fastener element is provided on the inner surface side of the protruding portion 12, the hook-and-loop fastener element is locked to the fastening sheet facing the hook-and-loop fastener element. When the hook-and-loop fastener element is a male material, the fastening sheet serves as a female material. When the hook-and-loop fastener element is a female material, a male material is provided on the surface of the fastening sheet that faces the female material when folded. Even when the hook-and-loop fastener element is a male material, a female material may be provided on the surface of the facing fastening sheet.

  And even if the person who performs the work of installing the paper diaper does not recognize the presence of the easy tear line 10 provided on the fastening sheet 5, the protruding portion of the folded fastening sheet 5 at the stage of mounting the paper diaper. When one of 12 is expanded outward to the folding position 14, it is torn from the tip of the easy tear line 10 to at least the folding position 14. This is due to the interaction between the force that spreads one protrusion 12 outward and the force that fastens the fastening sheet 5 facing the adhesive layer or hook-and-loop fastener element provided on the inner surface of the other protrusion 12. Is. Therefore, even if the presence of the easy tear line 10 is not recognized, the easy tear line 10 can be torn. As a result, the disposable diaper can be fitted to the user using the torn fastening sheet 5, and leakage of urine or the like can be prevented. If the easy tear line 10 extends further to the proximal end side than the folding position 14, the upper and lower fastening sheets 5 can be moved more freely by further tearing operation. As a result, the disposable diaper can be fitted and worn by the user using the torn fastening sheet 5.

  In addition, it is preferable that the shape on the base end side of the separating portion 13 between the upper and lower protruding portions 12 is substantially V-shaped, and is formed by a curve or a straight line gradually narrowing from the tip end side toward the terminal end on the base end side. Although the shape of the base end side between the upper and lower protrusions 12 can be as shown in FIG. 4, the easy tear line 10 can be more easily cut by adopting the form as shown in FIG. In addition, although the example which consists of a curve was shown in FIG. 5, you may make it consist of a straight line.

  Further, it is preferable that the interval between the easy tear lines 10 extending from the folding position 14 to the distal end side is smaller than the distance between the easy tear lines 10 extending from the folding position 14 to the proximal end side. Specifically, the perforation interval is adjusted so that the tear strength of the easy tear line 10 extending from the turn-back position 14 to the tip side is 0.01 to 6N, preferably 0.01 to 2N. It is preferable to adjust the perforation interval so that the tear strength of the easy tear line 10 extending to the end side is 3 to 10 N, preferably 4 to 8 N.

  Alternatively, a configuration in which almost all of the joint portions are cut in advance from the front end side of the easy tear line 10 to the folding position 14 is also preferable. At this time, from the viewpoint of facilitating the tearing between the front end side of the easy tear line 10 and the turn-back position 14, it is preferable that the number of joined portions is small. Further, at this time, it is preferable to provide a portion joined between the front end side of the easy tear line 10 and the turn-back position 14 at a position close to the front end side. If the part being joined is far from the tip side, there is an advantage that it becomes easy to cut, but there is a disadvantage that the tip side may be split into two parts at the time of manufacture, and there is a possibility of unintentional folding. is there.

  With such a configuration, the easy tear line 10 extending from the folding position 14 to the distal end side can be more easily torn than the easy tear line 10 extending from the folding position 14 to the proximal end side. As a result, it becomes easy to obtain the effect of the present invention that the easy tear line 10 can be torn regardless of whether the presence of the easy tear line 10 is confirmed during the mounting operation.

  Further, of the two upper and lower protrusions 12, one protrusion 12 is longer than the other protrusion 12 and protrudes outward, and an adhesive layer or surface provided on the other protrusion 12. It is preferable to make the strength of the fastener element 9 stronger than the strength of the pressure-sensitive adhesive layer or the hook-and-loop fastener element 9 provided on the one protrusion 12. Since the pressure-sensitive adhesive layer or the hook-and-loop fastener element 9 provided on the other protrusion 12 is strong in this way, when the one protrusion 12 is pinched and peeled off, the easy tear line 10 can be easily cut. Moreover, since one protrusion part 12 is longer than the other protrusion part 12, and protrudes outward, the person who performs the operation | work of a paper diaper protrudes outward among the protrusion parts 12 of the upper and lower two steps. One long projecting portion 12 can be guided to be pinched. And since the intensity | strength of the adhesive layer or hook-and-loop fastener element 9 provided in one protrusion part 12 is weaker than the intensity | strength of the adhesive layer or hook-and-loop fastener element 9 provided in the other protrusion part 12, it is pinched It becomes easy to peel off the protruding portion 12.

  Further, it is preferable that the folded left and right positions are provided at positions separated from the distal end side end portion of the easy tear line 10 by 10 mm or more toward the proximal end side. With this configuration, when one of the protruding portions 12 of the folded fastening sheet 5 is expanded outward to the folding position 14, it is cut from the tip of the easy tear line 10 to at least the folding position 14. Can be made longer. As a result, the labor of further tearing operation can be reduced.

  Further, a C-shaped cut 20 is provided at the proximal end of the easy tear line 10 in order to prevent tearing from the proximal end. This notch 20 is used to disperse the stress generated at the base end when the easy tear line 10 is torn to the base end side so that the tear does not occur beyond the base end of the easy tear line 10. . Therefore, as long as the purpose of dispersing such stress can be achieved, the shape is not limited to the C shape, and can be any shape such as a circle, an ellipse, and a triangle.

  Further, at the stage of manufacturing the fastening sheet 5, in order to reduce waste members, the shape of the separating portion 13 between the upper and lower two-stage protruding portions 12 and the shape of the protruding portions 12 are point-symmetric. Good to do. Specifically, a fastening sheet having a predetermined width is fed out, and the hook-and-loop fastener element 9 is bonded or coated with an adhesive layer continuously at the center position. Then, the hook-and-loop fastener elements 9 or the adhesive layer are alternately cut across by a continuous wavy curve, and a cutting line for dividing each fastening sheet 5 is provided, and each fastening sheet 5 is easily cut at a predetermined position. Manufacture by inserting the wire 10.

  DESCRIPTION OF SYMBOLS 1 ... Back sheet, 2 ... Top sheet, 3 ... Absorber, 4 ... Barrier sheet, 5 ... Fastening sheet, 6 ... Front target tape, 7 ... Thread-like elastic elastic member, 8 ... Base material sheet, 9 ... Surface fastener element, DESCRIPTION OF SYMBOLS 10 ... Easy tear line, 11 ... Tear stopper, 12 ... Protrusion part, 13 ... Separation part, 14 ... Folding position, 15 ... Liquid impervious sheet, 16 ... Second sheet, F ... Abdominal part, B ... Dorsal part , EF ... End flap part, SF ... Side flap part

Claims (6)

At least two upper and lower protrusions protruding outward are formed on the base sheet on both sides of the back side of the paper diaper, and an adhesive layer or a hook-and-loop fastener element is provided on the inner surface of the protrusion. In a disposable diaper comprising a fastening sheet, and adapted to be attached to the body by fastening the protrusion to the ventral surface of a paper diaper,
An easy tear line is formed from the front end side to the base end side between the upper and lower protrusions,
In the product state, the front end side of the fastening sheet is folded back with the inner surface side of the protruding portion inside,
The disposable diaper characterized in that the folded left and right position is located closer to the proximal end side of the fastening sheet than the distal end of the easy tear line.   The disposable diaper according to claim 1, wherein a shape of the base end side between the upper and lower protruding portions is substantially V-shaped, and is a curve or a straight line gradually narrowing from the distal end side toward the terminal end of the proximal end side.   The disposable diaper according to claim 1 or 2, wherein an interval between easy tear lines extending from the folded position to the distal end side is smaller than an interval between easy tear lines extending from the folded position to the proximal end side.   The disposable diaper according to any one of claims 1 to 3, wherein substantially all of the joint portions are cut in advance between the front end side of the easy tear line and the folding position. Of the two upper and lower protruding portions, one protruding portion is longer than the other protruding portion, and protrudes outward,
The disposable diaper according to claim 1, wherein the strength of the pressure-sensitive adhesive layer or the hook-and-loop fastener element provided on the other protrusion is stronger than the strength of the pressure-sensitive adhesive layer or the hook-and-loop fastener element provided on the one protrusion. .   The disposable diaper according to any one of claims 1 to 5, wherein the folded left and right position is a position spaced 10 mm or more from the distal end side end of the easy tear line to the proximal end side.

Images